/**
 * WYSIWYG - jQuery plugin 0.5
 *
 * Copyright (c) 2008-2009 Juan M Martinez
 * http://plugins.jquery.com/project/jWYSIWYG
 *
 * Dual licensed under the MIT and GPL licenses:
 *	 http://www.opensource.org/licenses/mit-license.php
 *	 http://www.gnu.org/licenses/gpl.html
 *
 * $Id: $
 */
(function( $ )
{
	$.fn.document = function()
	{
		var element = this[0];

		if ( element.nodeName.toLowerCase() == 'iframe' )
			return element.contentWindow.document;
			/*
			return ( $.browser.msie )
				? document.frames[element.id].document
				: element.contentWindow.document // contentDocument;
			 */
		else
			return $(this);
	};

	$.fn.documentSelection = function()
	{
		var element = this[0];

		if ( element.contentWindow.document.selection )
			return element.contentWindow.document.selection.createRange().text;
		else
			return element.contentWindow.getSelection().toString();
	};

	$.fn.wysiwyg = function( options )
	{
		if ( arguments.length > 0 && arguments[0].constructor == String )
		{
			var action = arguments[0].toString();
			var params = [];

			for ( var i = 1; i < arguments.length; i++ )
				params[i - 1] = arguments[i];

			if ( action in Wysiwyg )
			{
				return this.each(function()
				{
					$.data(this, 'wysiwyg')
					 .designMode();

					Wysiwyg[action].apply(this, params);
				});
			}
			else return this;
		}

		var controls = {};

		/**
		 * If the user set custom controls, we catch it, and merge with the
		 * defaults controls later.
		 */
		if ( options && options.controls )
		{
			var controls = options.controls;
			delete options.controls;
		}

		var options = $.extend({
			html : '<'+'?xml version="1.0" encoding="UTF-8"?'+'><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8">STYLE_SHEET</head><body>INITIAL_CONTENT</body></html>',
			css	 : {},

			debug		 : false,

			autoSave	 : true,  // http://code.google.com/p/jwysiwyg/issues/detail?id=11
			rmUnwantedBr : true,  // http://code.google.com/p/jwysiwyg/issues/detail?id=15
			brIE		 : true,

			controls : {},
			messages : {}
		}, options);

		options.messages = $.extend(true, options.messages, Wysiwyg.MSGS_EN);
		options.controls = $.extend(true, options.controls, Wysiwyg.TOOLBAR);

		for ( var control in controls )
		{
			if ( control in options.controls )
				$.extend(options.controls[control], controls[control]);
			else
				options.controls[control] = controls[control];
		}

		// not break the chain
		return this.each(function()
		{
			Wysiwyg(this, options);
		});
	};

	function Wysiwyg( element, options )
	{
		return this instanceof Wysiwyg
			? this.init(element, options)
			: new Wysiwyg(element, options);
	}

	$.extend(Wysiwyg, {
		insertImage : function( szURL, attributes )
		{
			var self = $.data(this, 'wysiwyg');

			if ( self.constructor == Wysiwyg && szURL && szURL.length > 0 )
			{
				if ( attributes )
				{
					self.editorDoc.execCommand('insertImage', false, '#jwysiwyg#');
					var img = self.getElementByAttributeValue('img', 'src', '#jwysiwyg#');

					if ( img )
					{
						img.src = szURL;

						for ( var attribute in attributes )
						{
							img.setAttribute(attribute, attributes[attribute]);
						}
					}
				}
				else
				{
					self.editorDoc.execCommand('insertImage', false, szURL);
				}
			}
		},

		createLink : function( szURL )
		{
			var self = $.data(this, 'wysiwyg');

			if ( self.constructor == Wysiwyg && szURL && szURL.length > 0 )
			{
				var selection = $(self.editor).documentSelection();

				if ( selection.length > 0 )
				{
					self.editorDoc.execCommand('unlink', false, []);
					self.editorDoc.execCommand('createLink', false, szURL);
				}
				else if ( self.options.messages.nonSelection )
					alert(self.options.messages.nonSelection);
			}
		},

		setContent : function( newContent )
		{
			var self = $.data(this, 'wysiwyg');
				self.setContent( newContent );
				self.saveContent();
		},

		clear : function()
		{
			var self = $.data(this, 'wysiwyg');
				self.setContent('');
				self.saveContent();
		},

		MSGS_EN : {
			nonSelection : 'select the text you wish to link'
		},

		TOOLBAR : {
			bold		  : { visible : true, tags : ['b', 'strong'], css : { fontWeight : 'bold' } },
			italic		  : { visible : true, tags : ['i', 'em'], css : { fontStyle : 'italic' } },
			strikeThrough : { visible : false, tags : ['s', 'strike'], css : { textDecoration : 'line-through' } },
			underline	  : { visible : false, tags : ['u'], css : { textDecoration : 'underline' } },

			separator00 : { visible : false, separator : true },

			justifyLeft	  : { visible : false, css : { textAlign : 'left' } },
			justifyCenter : { visible : false, tags : ['center'], css : { textAlign : 'center' } },
			justifyRight  : { visible : false, css : { textAlign : 'right' } },
			justifyFull	  : { visible : false, css : { textAlign : 'justify' } },

			separator01 : { visible : false, separator : true },

			indent	: { visible : false },
			outdent : { visible : false },

			separator02 : { visible : false, separator : true },

			subscript	: { visible : false, tags : ['sub'] },
			superscript : { visible : false, tags : ['sup'] },

			separator03 : { visible : false, separator : true },

			undo : { visible : false },
			redo : { visible : false },

			separator04 : { visible : false, separator : true },

			insertOrderedList	 : { visible : false, tags : ['ol'] },
			insertUnorderedList	 : { visible : false, tags : ['ul'] },
			insertHorizontalRule : { visible : false, tags : ['hr'] },

			separator05 : { separator : true },

			createLink : {
				visible : true,
				exec	: function()
				{
					var selection = $(this.editor).documentSelection();

					if ( selection.length > 0 )
					{
						if ( $.browser.msie )
							this.editorDoc.execCommand('createLink', true, null);
						else
						{
							var szURL = prompt('URL', 'http://');

							if ( szURL && szURL.length > 0 )
							{
								this.editorDoc.execCommand('unlink', false, []);
								this.editorDoc.execCommand('createLink', false, szURL);
							}
						}
					}
					else if ( this.options.messages.nonSelection )
						alert(this.options.messages.nonSelection);
				},

				tags : ['a']
			},

			insertImage : {
				visible : true,
				exec	: function()
				{
					if ( $.browser.msie )
						this.editorDoc.execCommand('insertImage', true, null);
					else
					{
						var szURL = prompt('URL', 'http://');

						if ( szURL && szURL.length > 0 )
							this.editorDoc.execCommand('insertImage', false, szURL);
					}
				},

				tags : ['img']
			},

			separator06 : { separator : true },

			h1mozilla : { visible : true && $.browser.mozilla, className : 'h1', command : 'heading', arguments : ['h1'], tags : ['h1'] },
			h2mozilla : { visible : true && $.browser.mozilla, className : 'h2', command : 'heading', arguments : ['h2'], tags : ['h2'] },
			h3mozilla : { visible : true && $.browser.mozilla, className : 'h3', command : 'heading', arguments : ['h3'], tags : ['h3'] },

			h1 : { visible : true && !( $.browser.mozilla ), className : 'h1', command : 'formatBlock', arguments : ['Heading 1'], tags : ['h1'] },
			h2 : { visible : true && !( $.browser.mozilla ), className : 'h2', command : 'formatBlock', arguments : ['Heading 2'], tags : ['h2'] },
			h3 : { visible : true && !( $.browser.mozilla ), className : 'h3', command : 'formatBlock', arguments : ['Heading 3'], tags : ['h3'] },

			separator07 : { visible : false, separator : true },

			cut	  : { visible : false },
			copy  : { visible : false },
			paste : { visible : false },

			separator08 : { separator : true && !( $.browser.msie ) },

			increaseFontSize : { visible : true && !( $.browser.msie ), tags : ['big'] },
			decreaseFontSize : { visible : true && !( $.browser.msie ), tags : ['small'] },

			separator09 : { separator : true },

			html : {
				visible : false,
				exec	: function()
				{
					if ( this.viewHTML )
					{
						this.setContent( $(this.original).val() );
						$(this.original).hide();
					}
					else
					{
						this.saveContent();
						$(this.original).show();
					}

					this.viewHTML = !( this.viewHTML );
				}
			},

			removeFormat : {
				visible : true,
				exec	: function()
				{
					this.editorDoc.execCommand('removeFormat', false, []);
					this.editorDoc.execCommand('unlink', false, []);
				}
			}
		}
	});

	$.extend(Wysiwyg.prototype,
	{
		original : null,
		options	 : {},

		element	 : null,
		editor	 : null,

		init : function( element, options )
		{
			var self = this;

			this.editor = element;
			this.options = options || {};

			$.data(element, 'wysiwyg', this);

			var newX = element.width || element.clientWidth;
			var newY = element.height || element.clientHeight;

			if ( element.nodeName.toLowerCase() == 'textarea' )
			{
				this.original = element;

				if ( newX == 0 && element.cols )
					newX = ( element.cols * 8 ) + 21;

				if ( newY == 0 && element.rows )
					newY = ( element.rows * 16 ) + 16;

				var editor = this.editor = $('<iframe></iframe>').css({
					minHeight : ( newY - 6 ).toString() + 'px',
					width	  : ( newX - 8 ).toString() + 'px'
				}).attr('id', $(element).attr('id') + 'IFrame');

				if ( $.browser.msie )
				{
					this.editor
						.css('height', ( newY ).toString() + 'px');

					/**
					var editor = $('<span></span>').css({
						width	  : ( newX - 6 ).toString() + 'px',
						height	  : ( newY - 8 ).toString() + 'px'
					}).attr('id', $(element).attr('id') + 'IFrame');

					editor.outerHTML = this.editor.outerHTML;
					 */
				}
			}

			var panel = this.panel = $('<ul></ul>').addClass('panel');

			this.appendControls();
			this.element = $('<div></div>').css({
				width : ( newX > 0 ) ? ( newX ).toString() + 'px' : '100%'
			}).addClass('wysiwyg')
			  .append(panel)
			  .append( $('<div><!-- --></div>').css({ clear : 'both' }) )
			  .append(editor);

			$(element)
			// .css('display', 'none')
			.hide()
			.before(this.element);

			this.viewHTML = false;

			this.initialHeight = newY - 8;

			/**
			 * @link http://code.google.com/p/jwysiwyg/issues/detail?id=52
			 */
			this.initialContent = $(element).val();

			this.initFrame();

			if ( this.initialContent.length == 0 )
				this.setContent('');

			if ( this.options.autoSave )
				$('form').submit(function() { self.saveContent(); });

			$('form').bind('reset', function()
			{
				self.setContent( self.initialContent );
				self.saveContent();
			});
		},

		initFrame : function()
		{
			var self = this;
			var style = '';

			/**
			 * @link http://code.google.com/p/jwysiwyg/issues/detail?id=14
			 */
			if ( this.options.css && this.options.css.constructor == String )
				style = '<link rel="stylesheet" type="text/css" media="screen" href="' + this.options.css + '" />';

			this.editorDoc = $(this.editor).document();
			this.editorDoc_designMode = false;

			try {
				this.editorDoc.designMode = 'on';
				this.editorDoc_designMode = true;
			} catch ( e ) {
				// Will fail on Gecko if the editor is placed in an hidden container element
				// The design mode will be set ones the editor is focused

				$(this.editorDoc).focus(function()
				{
					self.designMode();
				});
			}

			this.editorDoc.open();
			this.editorDoc.write(
				this.options.html
					.replace(/INITIAL_CONTENT/, this.initialContent)
					.replace(/STYLE_SHEET/, style)
			);
			this.editorDoc.close();
			this.editorDoc.contentEditable = 'true';

			if ( $.browser.msie )
			{
				/**
				 * Remove the horrible border it has on IE.
				 */
				setTimeout(function() { $(self.editorDoc.body).css('border', 'none'); }, 0);
			}

			$(this.editorDoc).click(function( event )
			{
				self.checkTargets( event.target ? event.target : event.srcElement);
			});

			/**
			 * @link http://code.google.com/p/jwysiwyg/issues/detail?id=20
			 */
			$(this.original).focus(function()
			{
				$(self.editorDoc.body).focus();
			});

			if ( this.options.autoSave )
			{
				/**
				 * @link http://code.google.com/p/jwysiwyg/issues/detail?id=11
				 */
				$(this.editorDoc).keydown(function() { self.saveContent(); })
								 .keyup(function() { self.saveContent(); })
								 .mousedown(function() { self.saveContent(); });
			}

			if ( this.options.css )
			{
				setTimeout(function()
				{
					if ( self.options.css.constructor == String )
					{
						/**
						 * $(self.editorDoc)
						 * .find('head')
						 * .append(
						 *	   $('<link rel="stylesheet" type="text/css" media="screen" />')
						 *	   .attr('href', self.options.css)
						 * );
						 */
					}
					else
						$(self.editorDoc).find('body').css(self.options.css);
				}, 0);
			}

			$(this.editorDoc).keydown(function( event )
			{
				if ( $.browser.msie && self.options.brIE && event.keyCode == 13 )
				{
					var rng = self.getRange();
						rng.pasteHTML('<br />');
						rng.collapse(false);
						rng.select();

					return false;
				}
			});
		},

		designMode : function()
		{
			if ( !( this.editorDoc_designMode ) )
			{
				try {
					this.editorDoc.designMode = 'on';
					this.editorDoc_designMode = true;
				} catch ( e ) {}
			}
		},

		getSelection : function()
		{
			return ( window.getSelection ) ? window.getSelection() : document.selection;
		},

		getRange : function()
		{
			var selection = this.getSelection();

			if ( !( selection ) )
				return null;

			return ( selection.rangeCount > 0 ) ? selection.getRangeAt(0) : selection.createRange();
		},

		getContent : function()
		{
			return $( $(this.editor).document() ).find('body').html();
		},

		setContent : function( newContent )
		{
			$( $(this.editor).document() ).find('body').html(newContent);
		},

		saveContent : function()
		{
			if ( this.original )
			{
				var content = this.getContent();

				if ( this.options.rmUnwantedBr )
					content = ( content.substr(-4) == '<br>' ) ? content.substr(0, content.length - 4) : content;

				$(this.original).val(content);
			}
			
			$('#' + this.original.name).change();
			
			/*
			if ( this.options.callbacks ) {
				if (this.options.callbacks['changed']) {
					this.options.callbacks['changed'](this.original.name);
				}
			}*/
		},

		appendMenu : function( cmd, args, className, fn )
		{
			var self = this;
			var args = args || [];

			$('<li></li>').append(
				$('<a><!-- --></a>').addClass(className || cmd)
			).mousedown(function() {
				if ( fn ) fn.apply(self); else self.editorDoc.execCommand(cmd, false, args);
				if ( self.options.autoSave ) self.saveContent();
			}).appendTo( this.panel );
		},

		appendMenuSeparator : function()
		{
			$('<li class="separator"></li>').appendTo( this.panel );
		},

		appendControls : function()
		{
			for ( var name in this.options.controls )
			{
				var control = this.options.controls[name];

				if ( control.separator )
				{
					if ( control.visible !== false )
						this.appendMenuSeparator();
				}
				else if ( control.visible )
				{
					this.appendMenu(
						control.command || name, control.arguments || [],
						control.className || control.command || name || 'empty', control.exec
					);
				}
			}
		},

		checkTargets : function( element )
		{
			for ( var name in this.options.controls )
			{
				var control = this.options.controls[name];
				var className = control.className || control.command || name || 'empty';

				$('.' + className, this.panel).removeClass('active');

				if ( control.tags )
				{
					var elm = element;

					do {
						if ( elm.nodeType != 1 )
							break;

						if ( $.inArray(elm.tagName.toLowerCase(), control.tags) != -1 )
							$('.' + className, this.panel).addClass('active');
					} while ( elm = elm.parentNode );
				}

				if ( control.css )
				{
					var elm = $(element);

					do {
						if ( elm[0].nodeType != 1 )
							break;

						for ( var cssProperty in control.css )
							if ( elm.css(cssProperty).toString().toLowerCase() == control.css[cssProperty] )
								$('.' + className, this.panel).addClass('active');
					} while ( elm = elm.parent() );
				}
			}
		},

		getElementByAttributeValue : function( tagName, attributeName, attributeValue )
		{
			var elements = this.editorDoc.getElementsByTagName(tagName);

			for ( var i = 0; i < elements.length; i++ )
			{
				var value = elements[i].getAttribute(attributeName);

				if ( $.browser.msie )
				{
					/** IE add full path, so I check by the last chars. */
					value = value.substr(value.length - attributeValue.length);
				}

				if ( value == attributeValue )
					return elements[i];
			}

			return false;
		}
	});
})(jQuery);
